• Journal of Power Electronics
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• 제8권3호
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• pp.217-227
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• 2008

The electric power subsystems (EPS) of most remote sensing satellites consist of a solar array as a source of energy, a storage battery, a power management and control (PMC) unit and a charge equalization unit (CEU) for the storage battery. The PMC and CEU use high frequency transformers in their power modules. This paper presents a design, implementation and testing results of a high frequency transformer for the EPS of satellite applications. Two approaches are used in the design process of the transformer based on the pre-determined transformer specifications. The transformer is designed based on an ETD 29 ferrite core. The implemented transformer consists of one center-tapped primary coil with eleven center-tapped secondary coils. The offline calculation results and measured values of R, L for transformer coils are convergence. A test circuit for measuring the transformer parameters like voltage, current and B-H hysteresis was implemented and applied. The test results confirm that the voltage waveforms of both primary and secondary coils were as desired. No overlapping occurred between the control signal and the transformer, which was not saturated during testing even during a short circuit test of the secondary channels. The dynamic B-H loop characteristics of the used transformer cores were measured. The sample test results are given in this paper.

• Journal of Yeungnam Medical Science
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• 제14권2호
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• pp.483-496
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• 1997

만성 B형 간염의 경과중 흔히 볼 수 있는 간기능의 이상은 대부분 심한 황달의 동반없이 혈청 AST와 ALT의 증가만 보이면서 악화되는 것이다. 저자는 심한 황달을 동반한 16명의 만성 B형 간염 악화 환자(연구군)와 심한 황달없이 AST와 ALT치만 증가된 13명의 환자(비교군)를 비교관찰하였다. PMC 제재를 복용했던 환자는 연구군에서 11명(68.8%), 대조군에서 1명(7.7.%)으로 나타났으며 PMC를 포함하여 각종 약제 및 알콜 섭취가 저명했던 환자가 연구군에서 15명(93.8%), 대조군에서는 2명(15.4%)이었다. 혈청 HBeAg 양성율은 급성 악화전에는 연구군에서 14명 중 7명(50.0%), 비교군에서는 13명 모두 (100%)에서 양성이었으며, 급성 악화 경과후에는 연구군에서는 변함없었고 비교군에서는 13명중 3명(23.1%)에만 양성이었다. 연구군 중 anti-HBe 양성화는 한 사람도 생기지 않았고 6명이 사망하였으며 대조군에서는 8명의 환자에서 anti-HBe 양성화가 생겼고 아무도 간기능 부전으로 사망하지 않았다. 만성 B형 간질환에서 심한 황달을 동반한 급성 악화와 관련있는 요인은 진행된 만성 활동성 간염, 간경변 등 근본적으로 진행된 간기능 저하와 동반된 부적절한 약제나 알콜 복용이 확실히 관계있을 것으로 사료되며 간기능 부전도 그리 드물지 않다. 반면에 간경변으로 진행되기 전 상대적으로 진행이 덜 된 비교군의 만성 B형 간염 환자에서는 황달의 저명한 증가없이 간기능이 갑자기 악화될 때는 자연적인 혈청 anti-HBe 양성전환의 동반이 흔한 것으로 나타났다.

• Journal of Yeungnam Medical Science
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• 제14권2호
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• pp.329-336
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• 1997

만성 B형 간염의 경과중 흔히 볼 수 있는 간기능의 이상은 대부분 심한 황달의 동반없이 혈청 AST와 ALT의 증가만 보이면서 악화되는 것이다. 저자는 심한 황달을 동반한 16명의 만성 B형 간염 악화 환자(연구군)와 심한 황달없이 AST와 ALT치만 증가된 13명의 환자(비교군)를 비교관찰하였다. PMC 제재를 복용했던 환자는 연구군에서 11명(68.8%), 대조군에서 1명(7.7%)으로 나타났으며 PMC를 포함하여 각종 약제 및 알콜 섭취가 저명했던 환자가 연구군에서 15명(93.8%), 대조군에서는 2명(15.4%)이었다. 혈청 HBeAg 양성율은 급성 악화전에는 연구군에서 14명 중 7명(50.0%), 비교군에서는 13명 모두(100%)에서 양성이었으며, 급성 악화 경과후에는 연구군에서는 변함없었고 비교군에서는 13명 중 3명(23.1%)에서만 양성이었다. 연구군 중 anti-HBe 양성화는 한 사람도 생기지 않았고 6명이 사망하였으며 대조군에서는 8명의 환자에서 anti-HBe 양성화가 생겼고 아무도 간기능 부전으로 사망하지 않았다. 만성 B형 간질환에서 심한 황달을 동반한 급성 악화와 관련있는 요인은 진행된 만성 활동성 간염, 간경변 등 근본적으로 진행된 간기능 저하와 동반된 부적절한 약제나 알콜 복용이 확실히 관계있을 것으로 사료되면 간기능 부전도 그리 드물지 않다. 반면에 간경변으로 진행되기 전 상대적으로 진행이 덜 된 비교군의 만성 B형 간염 환자에서는 황달의 저명한 증가없이 간기능이 갑자기 악화될 때는 자연적인 혈청 anti-HBe 양성 전환의 동반이 흔한 것으로 나타났다.

• 지역사회간호학회지
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• 제19권1호
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• pp.46-56
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• 2008

Purpose: The purpose of this study was to identify the effects of pelvic floor muscle exercise on reducing the symptoms of stress urinary incontinence and improving attitude toward exercise and quality of life. Method: The research adopted was a nonequivalent control group pretest posttest design. The subjects were 55 persons who were surveyed using a structured questionnaire, and 23 persons in the experimental group among the total sample were measured for the peak pressure and the duration of PMC and trained correct pelvic floor muscle contraction using peritron in the first week. Then, pelvic floor muscle exercise was implemented for 6 weeks. The data was analyzed by $\chi^2$-test and t-test with the SPSS 10.0 program. Results: 1) The degree of stress urinary incontinence, frequency of urination, nocturia, urgency, noctural incontinence, the frequency and quantity of incontinence, outer clothing change and incomplete emptying decreased significantly more in the experimental group than in the control group. 2) Attitude toward pelvic floor muscle exercise and the qualify of life were improved significantly more in the experimental group than in the control group. 3) The peak pressure and duration of PMC increased significantly more in the posttest. Conclusion: Based on the results above, it is judged that pelvic floor muscle exercise is an effective nursing intervention in order to care for stress urinary incontinence.

• Journal of Photoscience
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• 제4권3호
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• pp.133-140
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• 1997

A system for studying oxidative hemolysis has been used by controling UV-irradiation and concentration of a novel molecular probe, N,N'-bis(2-hydroperoxy-2-methoxyethyl)-1,4,5,8-naphthalenetetra-carboxylic diimide (NP-III), which generates hydroxyl radical upon longer wavelength photoirradiation (> 350 nm). NP-III induces 25~30% of hemolysis at low concentration (50 $\mu$M) for 3h-irradiation of UVA. The simultaneous treatment of N-ethylmaleimide (NEM) with NP-IH completely hemotyzed erythrocytes under the same conditions as NP-III alone by both decreasing thiol group and increasing lipid peroxidation in erythrocyte membrane. However. thiol-reducing agents prevented the protein-crosslinking and lipid peroxidation on the NEM-synergistic hemolysis by partially scavenging hydroxyl radical and maintaining the thiol group of erythrocyte membrane in the reduced state. In addition, erythrocytes pretreated with 2,2,5,7,8-pentamethyl-6-hydroxychromane (PMC), vitamin E homologue was able to delay and decrease the lipid peroxidation when compared to cells pretreated with both NEM and PMC. We suggest that the presence of reduced thiols in inner membrane protein by GSH can prevent the protein-crosslinking and the lipid peroxidation, and eventually prevent the oxidative hemolysis of erythrocyte.

• 한국환경농학회지
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• 제24권3호
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• pp.238-244
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• 2005

Fertilization effects on changes in soil $CO_2$ flux and organic C in switchgrass (Panicum virgatum L.) land managed for biomass production were investigated. The mean daily soil $CO_2$ flux in the manure treatment was 5.63 g $CO_2-C\;m^{-2}\;d^{-1}$, and this was significantly higher than the mean value of 3.36 g $CO_2-C\;m^{-2}\;d^{-1}$ in the control. The mean daily $CO_2$ fluxes in N and P fertilizer treatments plots were not different when compared to the value in the control plots. Potentially mineralizable C (PMC), soil microbial biomass C (SMBC), and particulate organic C (POC) were highest at the 0 to 10 cm depth of the manure treatment. Potentially mineralizable C had the strongest correlation with SMBC (r = 0.91) and POC (r = 0.84). There was also a strong correlation between SMBC and POC (r = 0.90). Our results indicated that for the N and P levels studied, fertilization had no impact on temporal changes in soil organic C, but manure application had a significant impact on temporal changes in soil $CO_2$ evolution and active C constituents such as PMC, SMBC, and POC.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.174-175
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• 2007

A programmable metallization cell (PMC) memory structure with copper-saturated GeTe solid electrolyte films doped by nitrogen was prepared on a TiW bottom electrode by a co-sputtering technique at room temperature. The $Ge_{45}Te_{55}$ solid electrolyte films deposited with various $N_2$/Ar flow ratios showed an increase of crystallization temperature and especially, the electrolyte films deposited at $N_2$/Ar ratios above 30% showed a crystallization temperature above $400^{\circ}C$, resulting in surviving in a back-end process in semiconductor memory devices. The device with a 200 nm thick $Cu_{1-x}(Ge_{45}Te_{55})_x$ electrolyte switches at 1 V from an "off " state resistance, $R_{off}$, close to $10^5$ to an "on" resistance state, Ron, more than 20rders of magnitude lower for this programming current.

• 한국환경과학회지
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• 제28권1호
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• pp.19-35
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• 2019

This study investigates the performance of four Bayesian methods, Random Walk Metropolis (RWM), Hit-And-Run Metropolis (HARM), Adaptive Mixture Metropolis (AMM), and Population Monte Carlo (PMC), for estimating the parameters and uncertainties of probability rainfall distribution, and the results are compared with those of conventional parameter estimation methods; namely, the Method Of Moment (MOM), Maximum Likelihood Method (MLM), and Probability Weighted Method (PWM). As a result, Bayesian methods yield similar or slightly better results in parameter estimations compared with conventional methods. In particular, PMC can reduce parameter uncertainty greatly compared with RWM, HARM, and AMM methods although the Bayesian methods produce similar results in parameter estimations. Overall, the Bayesian methods produce better accuracy for scale parameters compared with the conventional methods and this characteristic improves the accuracy of probability rainfall. Therefore, Bayesian methods can be effective tools for estimating the parameters and uncertainties of probability rainfall distribution in hydrological practices, flood risk assessment, and decision-making support.

• The Journal of Korean Physical Therapy
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• 제33권6호
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• pp.304-306
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• 2021

Objectives: We report on a patient who showed mild bradykinesia due to injury of the corticofugal tract (CFT) from the secondary motor area following direct head trauma, which was demonstrated on diffusion tensor tractography (DTT). Case summary: A 58-year-old male patient underwent conservative management for subarachnoid hemorrhages caused by direct head trauma resulting from a fall from six-meter height at the department of neurosurgery of a local hospital. His Glasgow Coma Scale score was 3. He developed mildly slow movements following the head trauma and visited the rehabilitation department of a university hospital at ten weeks after the fall. The patient exhibited mild bradykinesia during walking and arm movements with mild weakness in all four extremities (G/G^-). Results: On ten-week DTT, narrowing of the right CFT from the supplementary motor area (SMA-CFT), and partial tearing of the left SMA-CFT, left CFTs from the dorsal premotor cortex (dPMC-CFT) and both corticospinal tracts (CSTs) at the subcortical white matter were observed. Conclusion: This case demonstrated abnormalities in both CSTs (partial tearing at the subcortical white matter and narrowing), both SMA-CFTs (narrowing and partial tearing) and left dPMC-CFT. We believe our findings suggest the necessity of assessment of the CFTs from the secondary motor area for patients with unexplained bradykinesia following direct head trauma.

• 재활간호학회지
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• 제3권1호
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• pp.43-58
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• 2000

Pain management is a major issue in caring of cancer patients. Patients' concerns for reporting pain and taking analgesics are patient-related barriers to the management of cancer pain. Since such study has not been done at all in Korea, it is clearly needed to study on these problems. The purpose of this study is to attain basic data in order to improve cancer pain management in Korea. This is done by: 1) examining the extent of patients' concerns that might be barriers to the optimal pain management, and the extent of related factors (pain management hesitancy, adequacy of using analgesics, pain severity and pain interference); 2) identifying the relationship between patients' concerns and the related factors. The data has been collected from 180 cancer patients who were hospitalized in medical wards of one university hospital in Seoul, Korea during the period from November 1, 1997 to February 28, 1998. The data has been collected through interviews with (1) Barriers Questionnaire - Korean Version (BQ-K); (2) Hesitancy Experience Questionnaires (HQ); (3) Pain Management Index (PMI); (4) Brief Pain Inventory (BPI); and (5) Demographic Data. The data were analyzed by descriptive statistics and by t-test, One-way ANOVA, Pearson correlation using SPSSWIN program. The Results are as following: 1) The mean scores of Pain Management Concerns (PMC) by BQ-K were toward the moderate with a little high points(2.59). Most of the patients (99.4%) had some extent of concerns (over lout of maximum 5 points). Among the eight subscales of BQ-K, the Pain Management Concerns (PMC) about 'Fear of tolerance' was the highest (3.80) and 'Worry about side effects' was the least (1.40). 2) The extent of Pain Management Hesitancy (PMH) by HQ of wnom had pain on the day of the interview was a little higher than moderate score(5.53 out of maximum 10 points). 6.7% of the patients with experiencing pain used less adequate analgesics for the severity of pain than they were expected. 27.8% of them never used any analgesics at all. The mean score of pain severity by BPI was 16.59 (maximum: 40), and that of the interference with daily life by BPI was 32.03 (maximum: 70). 3) The patients who were older, less educated, and in low socio-economic status were likely to have more concerns. Pain Management Concerns (PMC) was positively correlated with Pain Management Hesitancy (PMH) (r=.75), pain severity (r=.44) and pain interference (r=.50). Those who were not using adequate analgesics had higher Pain Management Concerns (PMC) than did those who were using adequate analgesics (t=-5.42). The patients who had more Pain Management Concerns (PMC) tended to hesitate more to report pain and to use analgesics. They used more inadequate analgesics for the severity of pain and also had experienced more pain severity and interference with daily life. In conclusion, the patients' concerns for reporting pain and for using analgesics are major patient-related barriers to cancer pain management in Korea. The patients' concerns were correlated significantly with the level of the hesitancy experience, inadequate use of analgesics, the pain severity and the interference with daily life. Considering this, an educational program for cancer patients under the treatment with analgesics should be developed in order to solve these problems.